Staybolt structure



B. E. D. STAFFORD AND E. I. DODDS. STAYBOLT STRUCTURE.

Patented Oct. 5, 1920.

UNITED STATES PATENT OFFICE.

- BENJAMIN I). STAFFORD AND ETI-IAN I. DODIJS, F PITTSBURGH,PENNSYLVANIA,

ASSIGNORS TO FLANNERY BOLT COMPANY, OF PITTSBURGH, PENNSYLVANIA.-

STAYIBOLT STRUCTURE.

Specification of Letters Patent.

Patented Oct. 5, 1920.

Application filed September 10,-1919. Serial No. 322,878.

T 0 all 7mm it may concern.

Be it known that we, BENJAMIN I). I). STAFFORD and ETHAN I. DODDS,citizens of the United States, and residents of Pittsburgh, in thecounty of Allegheny and and has its bearing,one object of the presentinvention being to provlde a construe-- tion in which a sleeve having arounded portion may have a universally movable seat on the boiler sheetat one end of the bolt opening in the sheet and which, when properly setor adjusted to insure correct alinement of the bolt with relation to itsconnections with the respective boiler sheets, may be securely unitedand fixed to the outer boiler sheet.

A further object is to provide a construction whereby a universallymovable or adjustable bearing sleeve is applied to the boiler sheet atthe opening from which a threaded bearing sleeve has been removed.

lVith these and other objects in view, the invention consists in certainnovel features of construction and combinations of parts as hereinafterset forth and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view showing the applicationof our invention where the bearing sleeve is applied to a boiler sheetfrom which a threaded sleeve has been removed, and Fig. 2 is a viewshowing the bearing sleeve applied at a drilled opening in the boilersheet, said opening having a smooth wall at right angles to the faces ofthe sheet.

1 represents an outer boiler sheet and 2 an inner boiler sheet.

In Fig. 1 the outer sheet is shown as having an opening 3 having athreaded wall and from which a threaded bearing sleeve which had beenpreviously installed, has been removed. The opening 3 serves for thepassage of the headed end of a staybolt I, the inner end of which issecured in any suitable manner to the inner boiler sheet 2. The head 4&at the outer end of the bolt may beof the spherical type or otherwiserounded in form as in staybolts of the flexible type, and has a bearingon a curved seat 5 within a bearing sleeve 6. The body portion of thesleeve 6 may be straight as indicated at 7 but its inner end portion iscurved or rounded as indicated at 8, the inner face of this curved orrounded portion affording the seat 5 for the head of the bolt and theexternal curved face 9 being adapted to have a bearing on the boilersheet.

The curved or rounded inner end portion of the sleeve enters the boltopening 3 in the boiler sheet, the diameter of which open ing is lessthan the diameter of the straight portion of the sleeve, and the curvedor rounded inner end portion of the sleeve has a universally movablebearing against the boiler sheet at the outer end of the opening 3. Thebearing sleeve, being universally movable, will be positioned to insurecorrect alinement of the staybolt with its points of connection with therespective boiler sheets and when such position of the sleeve shall havebeen accomplished, the sleeve will be permanently fixed and unitedintegrally with the boiler sheet by means of a weld 10 surrounding saidsleeve. The outer end portion of the sleeve is threaded to receive aplug or closure 11. In the drawing, the outer end portion. of the sleeveis shown as threaded internally and the plug or closure 11. entering thesleeve.

It will be apparent that when universally bearing sleeves such as shownin the drawing, are to be applied to a boiler sheet which had previouslybeen equipped with threaded bearing sleeves, this may be accomplished bymerely removing the threaded sleeves. If desired, however, the openingfor the universally movable bearing sleeve 6 may be drilled and ofuniform diameter from the outer to the inner face of the sheet asindicated at 12, Fig. 2.

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

1. In a staybolt structure, the combination with a boiler sheet having abolt opening, of a-bearing sleeve having a rounded inner end portionbearing against the boiler sheet at one edge only of said opening,whereby said bearing sleeve may have initial universal movement, and astaybolt having a head mounted in said sleeve.

- 2. In a staybolt structure, the combination with a boiler sheetprovided with a bolt opening having an approximately uniform diameterfrom the outer to the inn-erface of the sheet, of a bearing sleevehaving a rounded inner end portion entering said opening and bearingagainst the boiler sheet at one edge only of the opening therein,whereby said bearing sleeve may have initial universalmovement, and astaybolt having a head mounted in said sleeve.

3. In a istaybolt structure, the combination with-a boiler sheet havinga bolt openingtherein, of a bearing sleeve having a curved inner endportion entering said opening and bearing against the boiler sheet atone edge only ofthe opening therein, whereby said bearing sleeve mayhave initial universal movement, and a weld surrounding 'said sleeve andintegrally uniting the same with the boiler sheet.

In testimon whereof, we have signed this specification 1n the presenceof two subscribing witnesses.

